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Physics, 23.12.2020 04:00 tshepi5348

If you are holding a stack of books at your waist and then you walk across the room your hands did?

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Answer from: leahjade0307

3) work

Explanation:

Work is doing something that requires you to expend energy. In walking across the room while your hands were carrying the stack of books, you expended energy through them which means that they did work.

We can neither tell the efficiency nor the power taken to do the work above from the given information. And by moving and holding books, there was definitely work done which means that all options apart from 3 are false.

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Answer from: Quest

radiation warms things up temp rises convection currents air circ windy weather

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Answer from: Quest
Honestly "global warming" may be a slight possiblity, however they called it "climate change" because its not real, in fact we had one of our coldest days here not too long ago, and the "issues" with this subject is a blindfold for actual problems.

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